Time-related alterations of superoxide radical levels in diverse organs of bile duct-ligated rats |
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Authors: | Konstantinos Grintzalis Ioannis Papapostolou Stelios F Assimakopoulos Adamantios Mavrakis Konstantinos Faropoulos Nikolaos Karageorgos |
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Institution: | 1. Department of Biology, Division of Genetics, Cell and Developmental Biology;2. Department of Internal Medicine, School of Medicine;3. Department of Neurosurgery, School of Medicine |
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Abstract: | The time-related alterations of superoxide radical measured in vivo by employing an ultrasensitive fluorescent assay in the liver, intestine, kidney and brain of rats with experimentally induced obstructive jaundice was investigated. Eighteen rats were randomly divided into Group A, rats subjected to sham operation, and Group B, rats subjected to bile duct ligation (BDL). Three rats from each group were subsequently killed at different time points post-operatively (1, 5 and 10 days). As compared to sham-operated, BDL rats showed a gradual increase with time of superoxide radical in the intestine, liver, kidney and brain: for animals sacrificed on the 1st, 5th and 10th day the increase was 45%, 50% and 96% in the liver, 76%, 81% and 118% in the intestine, 64%, 71% and 110% in the kidney and 76%, 95% and 142% in the brain, respectively. This study provides direct evidence of an early appearance of oxidative stress in diverse organs, implying a uniform systemic response to biliary obstruction and emphasizing the need of early bile flow restoration. |
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Keywords: | Oxidative stress obstructive jaundice superoxide radical dihydroethidine reactive oxygen species free radicals |
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